A novel antipruritic useful for the treatment of pruritus accompanying various diseases is disclosed. The antipruritic comprises a specific morphinan derivative having a nitrogen-containing cyclic group or the pharmaceutically acceptable acid addition salt thereof such as N-(17-cyclopropylmethyl-4,5α-epoxy-3,14-dihydroxy-morphinan-6β-yl)-phthalimide hydrochloric acid salt
or N-( 17-cyclopropylmethyl-4,5α-epoxy-3,14-dihydroxy-morphinan-6β-yl)-3,4,5,6-tetrahydrophthalimide tartaric acid salt.
本发明公开了一种新型止痒剂,可用于治疗伴随各种疾病的瘙痒症。该止痒剂包括具有含氮环基的特定
吗啡南衍
生物或其药学上可接受的酸加成盐,例如 N-(17-
环丙基甲基-4,5α-环氧-3,14-二羟基
吗啡南-6β-基)-邻苯二甲
酰亚胺盐酸盐
或 N-(17-
环丙基甲基-4,5α-环氧-3,14-二羟基
吗啡南-6β-基)-3,4,5,6-四氢邻苯二甲
酰亚胺酒石酸盐。